JPS6040900Y2 - Bearing sealing device - Google Patents
Bearing sealing deviceInfo
- Publication number
- JPS6040900Y2 JPS6040900Y2 JP3360079U JP3360079U JPS6040900Y2 JP S6040900 Y2 JPS6040900 Y2 JP S6040900Y2 JP 3360079 U JP3360079 U JP 3360079U JP 3360079 U JP3360079 U JP 3360079U JP S6040900 Y2 JPS6040900 Y2 JP S6040900Y2
- Authority
- JP
- Japan
- Prior art keywords
- seal
- shield plate
- seal body
- contact
- bearing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/784—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race
- F16C33/7843—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc
- F16C33/7853—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc with one or more sealing lips to contact the inner race
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
Description
【考案の詳細な説明】
この考案は農機具等に使用されるころがり軸受のシール
装置に関するものである。[Detailed Description of the Invention] This invention relates to a sealing device for rolling bearings used in agricultural machinery and the like.
一般に、農機具はその性格上、泥水、土砂、肥料等にま
みれて使用される事が殆んどで、この為農機具等に使用
される軸受は特に密封効果の優れたシールが必要とされ
ている。Generally, due to their nature, agricultural machinery is almost always used while being covered with muddy water, earth and sand, fertilizer, etc., and for this reason, bearings used in agricultural machinery, etc. require particularly effective seals. .
従って従来の農機具等に使用されて来た軸受シールは、
上記した要求を考慮して製作されている。Therefore, the bearing seals that have been used in conventional agricultural machinery, etc.
Manufactured with the above requirements in mind.
即ち、第１図に示す如く、軸受シール１は鉄板製のシー
ルド板２とゴム又は合成樹脂材料等からなるシール体３
を一体に固着して、軸受外輪４に形成されたシール溝５
に、前記シールド板２の外周面を嵌入して固定させ、一
方向軸６の外周面６ａに形成されたシール溝７には前記
シール体３のリップ部３ａを接触させている。That is, as shown in FIG. 1, a bearing seal 1 includes a shield plate 2 made of iron plate and a seal body 3 made of rubber or synthetic resin material.
A seal groove 5 formed in the bearing outer ring 4 by fixing them together.
The outer circumferential surface of the shield plate 2 is fitted and fixed, and the lip portion 3a of the seal body 3 is brought into contact with the seal groove 7 formed on the outer circumferential surface 6a of the one-way shaft 6.
即ち、従来の農機具等に使用されている軸受シール１は
、その軸受と接触する接触部に於いて、これらを強制的
に接触させる事によって、接触圧を高くし、前記シール
溝５及び７とリップ部３ａ及びシールド板２の外周面と
の密着性を強くして、塵埃の侵入を防止している。That is, the bearing seal 1 used in conventional agricultural machinery, etc., increases the contact pressure by forcibly bringing these into contact at the contact portion that contacts the bearing, and the seal grooves 5 and 7 The adhesion between the lip portion 3a and the outer peripheral surface of the shield plate 2 is strengthened to prevent dust from entering.
しかし乍ら、この種上記の軸受シール１であると密封効
果を高める為に接触部の接触圧を強くすると、今度は逆
に軸受の回転トルクを重くする事になり７０ドロス等の
デメリットが生じる。However, with this kind of bearing seal 1 mentioned above, if the contact pressure of the contact part is strengthened to improve the sealing effect, the rotating torque of the bearing will be increased, resulting in disadvantages such as 70 dross. .
又、接触圧を高くするとシールリップ部３ａの接触面が
一段と速く摩耗し、長期間の安定した密封効果を持続で
きなくなる。Furthermore, if the contact pressure is increased, the contact surface of the seal lip portion 3a will wear out more quickly, making it impossible to maintain a stable sealing effect for a long period of time.
この為軸受の回転トルクをスムーズに回転させるために
は、結局接触圧を弱くせねばならず、内輪６の外周面６
ａに形成されたシール溝７とシールリップ部３ａとの接
触部に隙間を生じさせ、これより塵埃が外部から侵入す
る。For this reason, in order to smoothly rotate the rotational torque of the bearing, the contact pressure must be weakened, and the outer circumferential surface of the inner ring 6
A gap is created at the contact portion between the seal groove 7 formed in a and the seal lip portion 3a, and dust enters from the outside through this gap.
更に、この種上記の軸受シール１は、前記軸受内輪６の
外周面６ａにシール溝７を形成しである為、軸受内に封
入したグリース等の潤滑剤が当該シール溝７より外部に
流出していた。Furthermore, since the above-mentioned bearing seal 1 of this kind has a seal groove 7 formed on the outer circumferential surface 6a of the bearing inner ring 6, lubricant such as grease sealed inside the bearing flows out from the seal groove 7. was.
又、軸受外輪４の外端シール溝６にシールド板２を加締
めた際、シールド板２が直接シール溝５に当接し、双方
の表面粗さ、平行度等の為、全面が均一に密着できず防
塵効果を著しく低下させていた。Also, when the shield plate 2 is crimped into the outer end seal groove 6 of the bearing outer ring 4, the shield plate 2 directly contacts the seal groove 5, and due to the surface roughness and parallelism of both sides, the entire surface is evenly adhered. This resulted in a significant drop in dustproofing effectiveness.
そこでこの考案は上記従来の欠点に鑑みこれを改良除去
したもので、内輪にシール溝を設けず、内輪外径に直接
シールを接触させ、いわゆるランドライディング形軸受
シールとして加工工数を節減すると同時に接触面の偏心
を出来るだけ小さくし、防塵効果の向上を計ったもので
ある。Therefore, this idea was developed by improving and eliminating the above-mentioned conventional drawbacks. Instead of providing a seal groove on the inner ring, the seal is brought into direct contact with the outer diameter of the inner ring, creating a so-called land-riding type bearing seal, which reduces machining man-hours and makes contact at the same time. The eccentricity of the surface was made as small as possible to improve the dustproof effect.
以下この考案の構成を図面に示す実施例に従って説明す
ると次の通りである。The configuration of this invention will be explained below according to the embodiment shown in the drawings.
第２図及び第３図に於いて、１１は本考案に係る軸受シ
ールであって、鋼板製シールド板１２とゴム製又は合成
樹脂材料等からなるシール体１３とを一体に固着して構
威しである。In FIGS. 2 and 3, 11 is a bearing seal according to the present invention, which is constructed by integrally fixing a shield plate 12 made of a steel plate and a seal body 13 made of a rubber or synthetic resin material. It is.
１４は内周の側端面にシール溝１５を有する外輪、１６
は内輪、１７は内輪１６の外周面１６ａと接触するシー
ルのリップ部、１８は前記シールド板１２とシールリッ
プ部１７の先端部に設けた段部１９との間に形成させる
ラビリンス隙間、２０は外輪１４のシール溝１５に形成
させた外輪シール溝段部、２１はシールリップ１７が内
輪１６の外周面１６ａと接触する接触面の一部に於いて
形成されたグリースポケット、２２はシール体１３の内
径側の一部に設けたリブ、２３は鋼球、２４は保持器で
ある。14 is an outer ring having a seal groove 15 on the side end surface of the inner circumference; 16;
17 is the inner ring, 17 is the lip of the seal that contacts the outer peripheral surface 16a of the inner ring 16, 18 is the labyrinth gap formed between the shield plate 12 and the step 19 provided at the tip of the seal lip 17, and 20 is the lip of the seal that contacts the outer peripheral surface 16a of the inner ring 16. An outer ring seal groove step formed in the seal groove 15 of the outer ring 14, 21 a grease pocket formed in a part of the contact surface where the seal lip 17 contacts the outer peripheral surface 16a of the inner ring 16, and 22 a seal body 13. 23 is a steel ball, and 24 is a cage.
尚第３図中の点線は自由状態でのシール体１３の断面形
状を示す。Note that the dotted line in FIG. 3 indicates the cross-sectional shape of the seal body 13 in a free state.
次に本考案に係る軸受シール１１を構成するシールド板
１２の外周を実際にシール溝１５に加締めた場合、当該
シールド板１２は、その外周近く迄ゴム製或は合成樹脂
材料のシール体１３が延長して来て結合されている為、
外輪１４のシール溝１５に形成されたシール溝段部２０
とシールド板１２との間に前記シール体１３の外周部が
挾み込まれて隙間を完全に充填してこの部分からの塵埃
の侵入を防止している。Next, when the outer periphery of the shield plate 12 constituting the bearing seal 11 according to the present invention is actually crimped into the seal groove 15, the shield plate 12 will close to the outer periphery of the seal body 13 made of rubber or synthetic resin material. have been extended and combined,
Seal groove step portion 20 formed in seal groove 15 of outer ring 14
The outer periphery of the seal body 13 is sandwiched between the shield plate 12 and the shield plate 12 to completely fill the gap and prevent dust from entering from this area.
従って、従来の様にシールド板と外輪固定溝とが当接し
た時、その表面の粗さや平行度等によって接触面が均一
に密着しない等と言った不具合を解消する事が出来る。Therefore, it is possible to solve the conventional problem that when the shield plate and the outer ring fixing groove come into contact with each other, the contact surfaces do not adhere uniformly due to the roughness or parallelism of the surface.
次に、前記シール体１３のシールリップ部１７は内輪１
６の外周面１６ａと接触する接触面に於いて、その接触
域を出来るだけ長く確保し、充分その長さを持たせ当該
外周面１６ａと接触させると共に、前記シールリップ部
１７の先端には段部１９を形成してシールド板１２の内
周部との面にラビリンス隙間１８を形成し、外部からの
塵埃等異物の侵入によるシールリップ部１７の損傷を防
止している。Next, the seal lip portion 17 of the seal body 13 is attached to the inner ring 1.
At the contact surface that contacts the outer circumferential surface 16a of the seal lip portion 17, the contact area is secured as long as possible, and the contact area is sufficiently long to contact the outer circumferential surface 16a, and the tip of the seal lip portion 17 is provided with a step. A labyrinth gap 18 is formed on the surface of the inner peripheral portion of the shield plate 12 by forming a portion 19 to prevent damage to the seal lip portion 17 due to entry of foreign matter such as dust from the outside.
更に本考案に係る軸受シール１１はシール体１３の内径
側の一部に設けたリブ２２とシールリップ部１７とで二
重リップを構威し、密封効果をより一層高めると共にそ
の間に形成されたグリースポケット２１に潤滑剤等のグ
リースを保持させ、前記二枚のリップ部１７及び２２と
の潤滑をスムーズに行ってシールリップ部１７の摩耗を
防ぐと同時に前記グリースポケット２１に保持された潤
滑剤により外部からの塵埃の侵入をも防止し、グリース
シール効果を一段と向上させている。Furthermore, the bearing seal 11 according to the present invention has a double lip formed by the rib 22 provided on a part of the inner diameter side of the seal body 13 and the seal lip portion 17, which further enhances the sealing effect and has a double lip formed between the rib 22 and the seal lip portion 17. Grease such as a lubricant is held in the grease pocket 21 to smoothly lubricate the two lip parts 17 and 22 to prevent wear of the seal lip part 17, and at the same time, the lubricant held in the grease pocket 21 This also prevents dust from entering from the outside, further improving the grease sealing effect.
又、シールリップ部１７の接触する内輪１６の外周面１
６ａは偏心量１０μｍ以下と小さく、且つ当該外周面１
６ａをタンブラ−仕上げすることにより一段と表面粗さ
を小さく出来る。In addition, the outer circumferential surface 1 of the inner ring 16 that the seal lip portion 17 contacts
6a has a small eccentricity of 10 μm or less, and the outer peripheral surface 1
By tumble finishing 6a, the surface roughness can be further reduced.
この為シールリップ部１７のバタツキや摩耗を防止する
事が出来る。Therefore, flapping and abrasion of the seal lip portion 17 can be prevented.
以上説明した様にこの考案は外輪のＵ字形シール溝にＵ
字形に膨径させつつ加締め装着される外周部を有し、内
周部を内輪外周面付近まで延長した鋼板製のシールド板
の内側面にゴム又は合成樹脂等からなるシール体を一体
に結合し、該シール体の内周部のリップ部を内輪外周面
に接触させたランドライディング形の軸受のシール装置
に於いて、前記シール体の外周部をシールド板の外周加
締め折返し部直前迄延長させて外輪のシール溝の内側環
状段部に接触させ、前記シール体の内周部にリブと、シ
ールド板の内周側端部に対して平行なうビリンス隙間を
形成する段部をもつシールリップ部とを設け、当該シー
ルリップ部の接触面と前記リブとの間にグリースポケッ
トを形成したから、シールド板を加締め肩により外輪の
シール溝に加締め装着する際、シールド板の外周加締め
折返し部を含む大部分を外輪シール溝に直接メタル接触
させ得るため、シールド板外周部を外輪シール溝に沿っ
て確実に塑性変形させて強固に係止固定させることがで
き、加締め不良を防止できる。As explained above, this idea has a U-shaped seal groove on the outer ring.
A sealing body made of rubber or synthetic resin is integrally bonded to the inner surface of a steel shield plate, which has an outer circumferential portion that expands into a letter shape and is crimped and installed, and whose inner circumferential portion extends to near the outer circumferential surface of the inner ring. In a sealing device for a land riding type bearing in which the lip portion of the inner circumferential portion of the seal body is in contact with the outer circumferential surface of the inner ring, the outer circumferential portion of the seal body is extended to just before the outer periphery crimped folded portion of the shield plate. a seal lip that is brought into contact with the inner annular stepped portion of the seal groove of the outer ring, and has a rib on the inner circumferential portion of the seal body and a stepped portion that forms a bilinse gap parallel to the inner circumferential end of the shield plate; Since a grease pocket is formed between the contact surface of the seal lip part and the rib, when the shield plate is crimped into the seal groove of the outer ring by the crimping shoulder, the outer periphery of the shield plate is crimped. Since the majority of the shield plate, including the folded part, can be brought into direct metal contact with the outer ring seal groove, the outer periphery of the shield plate can be reliably plastically deformed along the outer ring seal groove to be firmly locked and fixed, thereby preventing crimping failures. can.
また、シールド板の外周加締め郡全体をゴム等で覆った
場合では、軸受内部に封止されたグリースや残存空気等
が逃げ場を失ってシールド板の加締め装着を困難とする
が、前記のようにシール体をシールド板の外周加締め折
返し部直前迄としであることにより、グリースや空気の
逃げが加締め完了直前まで可能となり、シールド板の加
締め装着を容易化できる。Furthermore, if the entire outer circumference of the shield plate is covered with rubber, etc., the grease sealed inside the bearing, residual air, etc. will have no place to escape, making it difficult to tighten and install the shield plate. By arranging the seal body just before the outer crimping folded portion of the shield plate, it is possible for grease and air to escape until immediately before crimping is completed, and the shield plate can be easily crimped and installed.
そして、外輪シール溝とシールド板の間をシール体の外
周延長部でシールさせてグリース洩れや外部からの塵埃
、泥水等の侵入を防止させることができる。The space between the outer ring seal groove and the shield plate is sealed by the outer peripheral extension of the seal body, thereby preventing grease leakage and intrusion of dust, muddy water, etc. from the outside.
また、内周側においては、シール体のリブとシールリッ
プとで内輪外周面に接触して二重りツブシールを構威し
、密封効果を一段と高め、グリース洩れ及び塵埃、泥水
等の侵入を防止させることができる。Furthermore, on the inner circumferential side, the ribs of the seal body and the seal lip contact the outer circumferential surface of the inner ring to form a double lug seal, which further enhances the sealing effect and prevents grease leakage and intrusion of dust, muddy water, etc. be able to.
しかも、グリースポケットに保持されるグリースによっ
てリブとシールリップ部との潤滑を行いその摩耗を防止
し得る。Moreover, the grease held in the grease pocket can lubricate the rib and the seal lip, thereby preventing wear.
さらに、シールリップ部は内輪外周面の軸方向に平行な
面を当接してランドライディング形のシールを形成して
いるため、グリース洩れ防止及び塵埃、泥水等の侵入防
止を一層向上させ得る。Further, since the seal lip portion contacts the surface parallel to the axial direction of the outer peripheral surface of the inner ring to form a land riding type seal, it is possible to further improve prevention of grease leakage and intrusion of dust, muddy water, etc.
また、シールド板の内周側端部とシールリップ部の段部
との間に平行なうビリンス隙間を形成したから、シール
ド板の内周側端部内面とシールリップ部の屈曲部との間
の空間部に土砂、小石、泥水、穀稈、木片等が侵入する
ことを防止し、これらが該空間部内で固化してシールリ
ップ部の弾性機能を損ねることがなく、シール機能を長
期に亘って保持し、農機具の様な苛酷な使用条件に良く
耐え得るものである。In addition, since a parallel bilinse gap is formed between the inner end of the shield plate and the step of the seal lip, the gap between the inner surface of the inner end of the shield plate and the bent part of the seal lip is Prevents dirt, pebbles, muddy water, grain culms, wood chips, etc. from entering the space, and prevents these from solidifying within the space and impairing the elastic function of the seal lip, maintaining the sealing function for a long time. It is durable and can withstand harsh conditions of use such as agricultural equipment.
第１図は従来の軸受シール装置を示す縦断面図、第２図
は本考案に係る軸受シール装置の縦断面図、第３図はそ
の一部拡大縦断面図である。
１１・・・・・・軸受シール、１２・・・・・・シール
ド板、１３・・・・・・シール体、１４・・・・・・外
輪、１５・・・・・・シール溝、１６・・・・・・内輪
、１７・・・・・・シールリップ部、１８・・・・・・
ラビリンス隙間、１９・・・・・・段部、２０・・・・
・・外輪シール溝段部、２１・・・・・・グリースポケ
ット、２２・・・・・・リブ。FIG. 1 is a vertical cross-sectional view of a conventional bearing seal device, FIG. 2 is a vertical cross-sectional view of a bearing seal device according to the present invention, and FIG. 3 is a partially enlarged vertical cross-sectional view thereof. 11... Bearing seal, 12... Shield plate, 13... Seal body, 14... Outer ring, 15... Seal groove, 16 ...Inner ring, 17...Seal lip part, 18...
Labyrinth gap, 19...Stepped portion, 20...
... Outer ring seal groove step, 21 ... Grease pocket, 22 ... Rib.
Claims (1)
着される外周部を有し、内周部を内輪外周面付近まで延
長した鋼板製のシールド板の内側面にゴム又は合成樹脂
材料等からなるシール体を一体に結合し、該シール体の
内周部のリップ部を内輪外周面に接触させたランドライ
ディング形の軸受のシール装置に於いて、前記シール体
の外周部をシールド板の外周加締め折返し部直前迄延長
させて外輪のシール溝の内側環状段部に接触させ、前記
シール体の内周部にリブと、シールド板の内周側端部に
対して平行なうビリンス隙間を形成する段部をもつシー
ルリップ部とを設け、当該シールリップ部の接触面と前
記リブとの間にグリースポケットを形成したことを特徴
とする軸受のシール装置。Rubber or synthetic resin material is used on the inner surface of the steel shield plate, which has an outer circumferential portion that expands in a U-shape and is swaged into the U-shaped seal groove of the outer ring, and whose inner circumferential portion extends to near the outer circumferential surface of the inner ring. In a sealing device for a land riding type bearing, in which a seal body consisting of a seal body consisting of a seal body, etc. is integrally combined, and a lip portion of the inner circumference of the seal body is brought into contact with the outer circumferential surface of the inner ring, the outer circumference of the seal body is connected to a shield plate. The outer periphery of the seal body is crimped and extended to just before the folded part, and is brought into contact with the inner annular step of the seal groove of the outer ring, and a rib is provided on the inner periphery of the seal body, and a billin gap parallel to the inner periphery end of the shield plate. 1. A sealing device for a bearing, comprising: a seal lip portion having a stepped portion forming a seal lip portion; and a grease pocket is formed between a contact surface of the seal lip portion and the rib.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3360079U JPS6040900Y2 (en) | 1979-03-14 | 1979-03-14 | Bearing sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3360079U JPS6040900Y2 (en) | 1979-03-14 | 1979-03-14 | Bearing sealing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55132519U JPS55132519U (en) | 1980-09-19 |
| JPS6040900Y2 true JPS6040900Y2 (en) | 1985-12-11 |
Family
ID=28889404
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3360079U Expired JPS6040900Y2 (en) | 1979-03-14 | 1979-03-14 | Bearing sealing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6040900Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005299712A (en) * | 2004-04-07 | 2005-10-27 | Koyo Seiko Co Ltd | Rolling bearing and resin pulley device using it |
| US8561996B2 (en) * | 2009-05-25 | 2013-10-22 | Aktiebolaget Skf | Bearing assembly, particularly for use in agricultural applications |
-
1979
- 1979-03-14 JP JP3360079U patent/JPS6040900Y2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS55132519U (en) | 1980-09-19 |
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